Self-corrective detachable sheet for school textbooks



June 24, 1941. s, SMH-H 2,246,700 I SELF-CORRECTIVE DETACHABLE SHEET FOR SCHOOL TEXTBOOKS IW" School ....Roem..... Data.........lo.rig

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June 24,1941. 5 sMlTH 2,246,700

SELF-CORRECTIVE DETACHABLE SHEET FOR SCHOOL TEXTBOOKS Filed June 8, 1940 2 Sheets-Sheet 2 Il] I s'fuov MAnmALs Aon I 34 samuez smak Patented June 24, 1941 uint-Tfno ence-nr oer-rois;

SELFi-CDRRECTIVE DETAGHIBE i' SHEET l FORSHOOL TEXTBOOKS 'samuel smith, Brooklyn, NJYI" Applicati'omxune i8; 1940, 'Seriafl -N 339,541 (o1. 35S-48)` 8 Claims.

This invention: relatesV rta@ newr and .'.usefi'illfim`` Y proveniente in selfecorrective i question-.answer books with folding and 1: detachable sheets;` Lfor:`

school` text books.

More specifically, x the@ inventionz4 proposes cthe f construction' of` a 'bookgpad orcothericollectionl of i bound sheets, or loose sheets, inwhich-Tthesheets. are imprinted and constructed-inracertainfmannertocpermit easyicorrection, checking' of` answers wand :scoring .of results. tto. facilitate theV studies of students.:

More yespecifically, the:u invention" proposes -f :to

characterize each sheetreferred toin theprev-i-lous paragraph, `in; accordance `with `this invention,

so that. it `has several areaswithproblems print` ed on the frontfaceszot the areas, -andanswers= to the problems printed onwtheback faces and arranged so .that zsaidsheet Amay :be foldedfseveral ways with-a front facewof one areahaving problems then `:being adjacent :the back :face LoiA another area which givesthe .answers to these i problems.` It is.,proposedthat when said sheets;` are bound in =book....form,.that said lareasarefso arranged that the binding interferes .with the l required foldingof. saidsheets tofplace'said related `areas adjacent ea-ch other. that each sheet. have scoringor perforatonsadjacent the binding to.. facilitate.. detachment.- Then the sheet may be yproperly folded, as speci# y More specifically, the inventlonis intendedtor use in conjunction with school textbooksfin1al1 subjects, college textbooks in.al1.-subjects,.school and college tests .in all. subjects,.correspondence f It is proposed" Fig:` 4 showing the `sheetinv a vfolded condition? Fig. 7 is a'perspective'viewofa .hook#witl'rfself`k`v corrective 1 detachable sheets, constructedJ 'in jac` l cordancewithf this invention. ,2er

Figg is affragmentary elevational viewv'of the sheet fshown in Fig.` 1 associated with "resilient"-4 holding `strips,V as mechanical variations, in accordance with a-moded form of this' inventioir.v

.Fi-g.,` 9 :isi a perspective view of one-of tlfieresili-1H zai-ientiholding strips shown in Fig.- 8.

Fig-'l0 is a :fragmentary enlarged detailed ViewLe of. a `:portion of Fig.

The self-corrective ydetachable :sheetfo'r *school text books, and the like, in accordance *with the yform of the invention'illustratedi-in-li'igsf111361.31* includes asheet I2 showingthe remainsof ascore lineor perforations I2'- along its top edge which iacilitatedl removal of the sheet fromf-a lboulndi Fig. 6 is a -fragrnentary perspective f-viewfo'- abook, `said sheet I2 having several areas""l3,`-l4 and :I5 lseparated .by the-dot and dashflnes "I6 and I'I respectively. Problems I8and I9 `are school vand home` study materials,4 all subjects, quiz lcooks,- question-answerwlbooks` 4and games ror.- toys, question-answer. pages `or sections of maga-` zines and periodicals 4and newspapers, civil sei-'vice examinations. andfothertests. given Iby public` authorities.

Still furtherv the,` invention `contemplatesfso arranging said sheets that one-or more` of the areas may @be used as a work spacey for. a pupil printed onthe front faces of certain of theareas. Theproblems- I9 are 4problems in subtraction." The topof the sheet is imprinted wi-thmaterial" 20 for `receiving the name of the pupil, school', room, date, etc. The area I4 `v`is a Llolankare'a comprising awork space inwhich a pupil may calculate the answers to the various prob1e`ms.`

I folding the sheet and copying ananswer.k

`and accompanying drawings, and to ftheappend to place answers to the various problems thereon.

Still `further the invention contemplates i a 1 modified form :in whi-ch mechanical means is .pro-4 videldtoV tend to prevent pupils-from prematurely u-The first problem of each vgroup of-problems con'- tains its correct answerso-as -to-suggest to' the lpupil the mannerin which the V'sheet shouldibe used.

s The lback ofthe sheet I2 contains areas I3ai14` FOI' "further E001119161161151011 0f the Invention# 50- .and lcornprisingthe back facesiof the areas'l3," and of the objects and advantages thereof, ref- I4 and I5,"respectively. These'areas are divided" erence will be had to the following description bywlinesrlarand `I'Ia which are directly'align-edil Winn-the -iineszla and I1. In' fact, themes-16;' I1 and 1 IGa; vI'Ia may comprisels'coreilines im;

` printed through fltheimateriallof the sheet fI 2i ed claims in which .the variousnovel Afeatures of I the invention are more particularly setortlfl;`

Answers I8a and I9av for the problems I8 and I9 are printed on the back areas of the sheet I2. These answers are so arranged that when areas of the sheet are folded upwards, as for example shown in Fig. 3, the answers for the exposed problems may -be directly viewed. The area UIa is imprinted with study material and other material, as desired.

The sheet is used in the following manner:

Each pupil is given a book containing the selfcorrective detachable sheets. 'Ihe pupil uses the top sheet. After he has completed the work on the sheet he waits until he is instructed to tear the page oi along the score line or perforations. It is pointed out that inasmuch as the book is bound along an area adjacent the score line or perforations the binding prevents the pupil from turning the sheet over so as to copy the answers on the back thereof. If he turns up a portion of the sheet the answers will appear upside down, and moreover, it will be quite diflicult to match the answers with the questions on the sheet without tearing out the sheet and properly folding it. Furthermore, suitable steps maybe taken to make it mpre diiicult to read and align the answers in an upside down position. For example, superiluous and incorrect answers may be included on the reverse side of the sheet so that unless the sheet is properly folded and aligned it is very difficult to copy the right answers.

While the drawings show the invention applied to arithmetic it should be clearly understood that the books may apply to other subjects, for example, English, though again this is only for illustrative purposes.

It may be advisable to point out additional procedure for using the sheets when such sheets are bound in regular book form. Such books may be used in the classroom. The pupils complete the work consisting not only of problems but also and/or questions, given in one column of the page or those given on the entire page. The pupils must then await further instructions from the teacher, if this is a classroom situation.

The teacher may collect the books before the pages are detached or the work is corrected, and examine the pupils answers. Or, within her discretion, the teacher may then and there instruct pupils to detach part or all of the page and correct their work, the page being torn always along the perforations.

In Figs. 4-6 inclusive, another form of the invention has been disclosed which distinguishes from the prior form in the fact that the study sheet has been laid out along the length of the sheet, as contrasted with the height of the sheet in the prior form. In this orrn of the invention there is a sheet 22 with remains of perforations 22' along its top edge, and said sheet being divided into several areas 23, 24 and 25 by score lines, or dot and dash lines 26 and 2. The area 23 is imprinted with problems 28. The area 25 is imprinted with problems 29. The central area 24 comprises a work space for the problems. The sheet has material 30 along its top edge for the pupils name, school, room, etc.

The back of the sheet 2 2 is provided with complementary areas 23a, 24a and 25a. The areas 25a and 2?EL contain the answers to the problems on the areas 23 and 25, respectively. The areas 23a, 24a and 25a are separated from each other by score or dot and dash lines 26a and 2la which are superimposed on the lines 26 and 2l. The sheet 22 may be folded along these lines 26 and 2'I so that the answers to the problems are dis- CII posed adjacent the problems, as indicated in Fig. 6.

In Fig. 'l a perspective view of a bound book provided with sheets in accordance with this invention has been disclosed. The binding is represented by reference numeral 252. It should be noted that the score line or perforations 22 run parallel to the binding 252. The lower left hand corner of the top sheet is shown turned upwards to illustrate that the answers on the back are upside down. The book may or may not be provided with covers. It is illustrated with covers 25.

In Figs. 8-11 inclusive another form of the invention has been disclosed characterized by the fact that the book of sheets or sheet, in accordance with this invention is associated with a holding mechanical means resisting the bending over of areas of the sheets or sheet to expose the answers to the problems. Specically, the sheet I2 (or a book of sheets) is provided with clips 32 mounted along the top and bottom edge portions. These clips are arranged to hold the sheet or sheets flat. 'Ihe sheets I2 are provided with the Various portions as previously explained. These parts may be identied by the reference numerals previously applied.

.Each clip 32 is formed from several sections 32a, 32b and 32C. These sections are hingedly connected by hinge constructions 33. These hinge constructions are arranged to be aligned with the score lines I6 and I7. Each hinge 33 is provided with stop elements 3@ which limit opening ofthe hinge into a position in which all of the sections are in a straightl line. However, each hinge 33 may be pivoted by moving the outer sections upwardly.

Springs 35 are coaxially mounted on the hinges 33 and have their ends acting between adjacent sections of the clip to hold the clip in a specific position. The outer sections 32a and 32c are provided With resilient hook portions 36 adapted to receive and hold the edge portions of the sheet I2, as shown in Fig. 8.

`The operation of this form of the device is as follows:

lThe self-corrective book of sheets or sheet is used in a manner identical to that previously disclosed. However, the tendency for a child to turn up the sides of the sheet or sheets 22 and glance at the answers is reduced since an obstacle has been placed in the way. To bend up an area of the sheet I2 it is now necessary that the top clip be grasped in one hand and the bottom clip in the other hand and then the clips simultaneously bent at one of their ends, or removed, so that a side of the sheet I?. may be bent up and over. This operation is suicient obstacle to reduce the temptation of cheating. The clips 32 may be slipped oil? the sheet or sheets I2 after the pupil has nished solving the problems. Then the sheet may be used as previously explained.

It is to be understood that the self-Corrective book may be of any shape and size, and could be used as regular text-book, with perforations on the side, and the fold lines may be located at any suitable position and direction for obtaining the answers to the pcblems.

While I have illustrated and described the preferred embodiments of my invention, it is to be understood that I do not limit myself to the precise constructions herein disclosed and the right is reserved to all changes and modifications 'coming within the scope of the invention as defined in the appended claims.

Having thus described my invention, what I claim as new, and desire to secure by United States Letters Patent is:

1. A self-corrective detachable sheet school text book or the like, comprising a bound book of sheets, each sheet having several appropriately designated areas, problems, printed on the front faces of said areas, and answers to said problems printed on the back faces of said areas and arranged so that said sheet may be folded several ways with the front face of one area having problems being adjacent the back face of another area having answers to said problems, and each sheet having a score line or perforations ex tended along the binding, said areas comprising three areas separated by two straight lines.

2. A self-corrective detachable sheet school text book or the like, comprising a bound book of sheets, each sheet having several appropriately designated areas, problems printed on the front faces of said areas, and answers to said problems printed on the back faces of said areas and arranged so that said sheet may be folded several ways with the front face of one area having problems being adjacent the back face of another area having answers to said problems, and each sheet having a score line or perforations extended along the binding, said areas comprising three areas separated by two straight lines, which are score lines or other lines facilitating the folding of the sheet.

3. In an article of the class described, a sheet of flexible material, parallel spaced score lines extended longitudinally of said sheet dividing off appropriately designed areas, said score lines facilitating the folding over of said areas to expose material imprinted on the back thereof, a strip positioned across the back of said sheet at right angles` to said score lines, and clips formed on the end of said strip and engageable upon the edges of said sheet for holding said sheet against being folded.

4. In an article of the class described, a sheet of flexible material, parallel spaced score lines extended longitudinally of said sheet dividing off appropriately designed areas, said score lines facilitating the folding over of said areas to expose material imprinted on the back thereof, a strip positioned across the back of said sheet at right angles to said score lines, and clips formed on the end of said strip and engagea/ble upon the edges of said sheet, said strip being formed with hinges in aligned position with said score lines, whereby portions of said strip and adjacent areas may be folded when desired to expose said printed material.

5. In an article of the class described, a sheet of flexible material, parallel spaced score lines extended longitudinally of said sheet dividing off appropriately designed areas, said score lines facilitating the folding over of said areas to expose material imprinted on the back thereof, a strip positioned across the back of said sheet at right angles to said score lines, and clips formed on the end of said strip and engageable upon the edges of said sheet, said strip being formed with hinges in aligned position with said score lines, whereby portions of said strip and adjacent areas may be folded when desired to expose said printed material, and means on said hinges for urging the portions of said strip into positions in which said areas will be extended.

6. In an article of the class described, a sheet of exible material, parallel spaced score lines extended longitudinally of said sheet dividing off appropriately designed areas, said score lines facilitating the folding over of said areas to expose material imprinted on the back thereof, a strip positioned across the back of said sheet at Vright angles to said score lines, and clips formed on the end of said strip and engagea-ble upon the edges of said sheet, said strip being formed with hinges in aligned position with said score lines, whereby portions of said strip and adjacent areas may be folded when desired to expose said printed material, and means on said hinges for urging the portion of said strip into positions in which said areas will be extended, comprising a spring for each of said hinges mounted concentric with the pivot thereof, and having ends engaging the material of said strip on either side of the hinge.

7. In an article of the class described, a sheet of flexible material, parallel spaced score lines extended longitudinally of said sheet dividing off appropriately designed areas, said score lines facilitating the folding over of said areas to expose material imprinted on the back thereof, a strip positioned across the back of said sheet at right angles to said score lines, and clips formed on the end of said strip and engageable upon the edges of said sheet, said strip being formed with hinges in aligned position with said score lines, whereby portions of said strip and adjacent areas may be folded when desired to expose said printed material, and means on said hinges for urging the portion of said strip into positions in which said areas will be extended, comprising a spring for each of said hinges mounted concentric with the pivot thereof, and having ends engaging the material of said strip on either side of the hinge, and means for limiting the rearward pivoting of the portions of said strip to a position in which said portions will be in axial alignment.

8. A self-corrective detachable sheet school text book or the like, comprising a bound book of sheets, each sheethaving several side areas separated by a central area and said areas being separated by fold lines extending substantially at right angles to said binding, problems printed on the front face of said side areas, answers to said problems printed on the back fa-ce of said side areas, answers to the set of problems appearing on the face of one of said side areas being on the back face of the other of said side areas, and a weakened line formed on each sheet parallel to the 'binding and at right angles to said fold lines, whereby any one of said sheets may be removed from said bound book to permit either of said outer areas to be folded over on said central area to expose the answers to the problems appearing on the face of said other side area.

SAMUEL SMITH. 

